Converter hood



C. VAN ANIBURGH.

CGNVERTERYHOOD.

APPLICATION FILED JULYZI, 1917..

RENEWEDSEPTJG, 1921.

Patented May 30, 1922.

4 sHEETs-sHEET'1.

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c. VAN AMBURGH.

CONVERTER HOOD.

APPLICATION FILED JULY2||1917. BENEWED SEPT.26. 1921. 1,417,588. Patented May30,1922.

4 SHEETS-SHEET 2.

c. VAN AMBURGH. vCONVERTER Hoon. APPLICATION FILED 1ULY2L1917- RENEWED SEPT.2G, 1921.

Patenwd May 30, 1922.

. l 4 SHEEjl'S-SHEET 3.A

Tickk.

C.` VAN AMBURGH.

coNvERTeR-Ho0D.

v APiPLlCATION FILED JULYZl, 1917. REN EWED'SEP T.26.192!.

1,417,588'. Patented May so, 1922.

4 SHEETS-SHEET 4.

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"V shown in section;

CHAR-Lus viiNv AMBURGH, 0F .TACOl/M, WASHINGTON, ASSIGLORf-TO AMERIA SMELTING & REFINING COMPANY,

CONVERTER Hoon.

vApplication led .T1115rv 21, 1917,-Seria1-No. 181,968.

' TofaZZ whom t may concern Be it known that-I, CHARLESy VAN AM- resident of rIacoma, in the countyl of `lDierce and State of Washington, have invented certain 'new and useful Improvements in Converter Hoods, ofwhich the following vis a specification.

` My invention relates in general `to an iml provement Y inA the connection between av movable metallurgical furnace and its permanently fixed gas discharging stack and specifically relates toa converter hood and its associated parts.

One of the objects of the invention is to provide a connectionv between the converter and hood which will have the least possible clearance and which will maintain a f substantially gas tight connection between the converter and hood under all working conditions.

Another object of the invention is to provide a connection which will in no way interfere with the normal operation ofthe converter and which will automatically clear itself of any accretions which may vform during the blowingor other operations incidental to the use of the device. .n v

Still another object of theinvention is to provide a conveniently positioned opening for charging the converter without removing the hood and to providea simple control for simultaneously.actuating a closure means for said opening and vfor controllingpthe gas flow through the hood. A

Various other objects and advantages of the invention will be in part obvious from an inspection of the accompanyingdrawings and in part will bermore full;7 set forth in the following particular description of one form Aof mechanism embodying my inven-v tion, and the invention also'consists in certain new and novel features of construction and combination of parts `hereinafter set forthand claimed.

' Referring tothe accompanyingdrawings:

Figure 1 is a view'in sideeleyation of one of a. series of converter units in a smelting plant, the several units of which discharge theirgaseous products into a conduit herein Specification of Letters .Patenti [a conPonATIoN ONNQEW ,JEnsEYL faerie@ Renewed YSeptember 26,'1921. Serial No.7;503,`383i Figure .KZis affront-elevational view of'a portionof thedevice 4shownin Figure-f1.; BURGH, a citizen of the United States, and

Figure A3 atransverse Jsectional view taken ,on theline 3-,3 ofFigure` 1 looking .in thedirection indicated; byi'the'arrovv;

Figure 4 1s a vertical sectional viewftaken yon the linea-4 of :FigureQ .looking inthe y direction indicated bylsthearrovv; Y :Figure I5 V1s a detailed front elevational ,viewiof .a portie-nef the movable closure and its .operating mechanism; and

.; ,Figures andr 7 are eachtransverse se'ctional viewstakenrespectively on the lines' 6 6 of Figure 1 and7v7 ofFigure 2;

Inrthe following; description vand inthe of expression but converter 10, designed in one position to discharge its gaseous'productsinto fa relatively iiXed hood 11leading Ato av conduit 12 which `Claims,.pmsrwiii be liaenaai byspeci@ as generic in `their f' yReferring to the drawings, there is shown v, `in general'a conventional formv of rotary may lead to the stack or bag house asis usual in 'plantsof the character suggested. The converter includes a cylindrical shell 13 (see Figure 4) mounte'dto rotate abouty its horizontally disposed axis and `driven from afmotor 14 through a gear drivel,

while the shell is resting on roller cradle'sl,

all asis usual in one well! known form ofvsuch devices. The cradle in this disclosure differs from the conventional form of such converter supports-in that rollers 17 aremounted in frames 18 pivotally mountedv to `the supportingbase 19 toautomatically adjust'the position of theiollers so 4 that they "maygre'l y spond to distortion inthe'shell or shi-fting of the axis of rotation ofthe same While actively working.' The shell is provided with an opening '20 in the side thereof adapted inone position of the converter-to open into the hood during the" blowing operation, orto receive scribed, or'vvhen-rotated into al discharging positionto pour its'contents onto the *l platthe charge -fed into 'the' hood opening 21 hereinaftermore fully dey the shell engaging lpairs on -rocking is shown in Figure'2and is deined on opposite longitudinal sides by a pair of rings 22 which vencircle f the shell and extend out- 22 to torni a converter stack carried by and extending radially outward from the shell '18.'V lThe converter stack projects centrally througha curved closure plate 24 which has a curvature with its center coincident with the axis ot rotation and extending. forwardly and rearwardly of the converter stach so as to project for some material distance in'each direction beyond the front and rear sides of the hood ll as shown more particularly in Figure 4.

vThe hood is ot a conventional form with vits lower lportion substantially square in .cross section as shown in Fig. l6 and with its` upper reduced end 25 cylindrical as shown in F ig. 3.

fastened to and opening into the conduit l2.

The weight ot the hood is supported mainly from cleats 26 (see Fig. l.) on opposite sides of the hood which rests loosely upon supporting-bars 27carried by the main sup ,porting 'trame 28. t is preferable however, to. consider that a material portion ot the weight ot the Ahood is 'supported directly on the rotatable converter shell and part-icularly upon the hood carrying rings'22. This supporting connection is provided by means two sets oli rollers 29 mounted on each side ot the hood9 each set of which is mount- `ed opposite ends otequalizingarms 30 each pivoted intermediate its length to a cleat 3l fastened to the side of the hood and coacting with the other cleats to reinforce `the lower portion -otthe hood against distortional strains. As the rings 22 are ot some material depth it is apparent that this term of mounting will tend to maintain the lower portion ot the hood in spaced relation to the vconverter shell` so that distortion ot f the shell, Vdue to the heat and other conditions present, will have little, it any, effect upon .the position ot the hood. vin this way the hood will vbe?v maintained substantially in fixed position under all working' condi-y tions. is the converter adjusts itself on its roller cradle support, the hood supporting` rollers 29 will likewise adjust vthemselves so that a smooth running converter' is provided under ,all conditions o'tvservice and at the same time the connection with the hood is maintained.

The lower iront side of the hood is cutaway to provide the opening' 21 through which the converter may be charged when the lconveyer is in position to open the stack towards said opening. The opening is pro.-

. either The upper end isloosely hood and the ad]acent forwardly extendingv includes av frame formed ot Va pair ot cable segments 34 mounted on opposite sides et the hood above the opening 2l. To the forward ot each oi these cable segments is attached a cable 35 trained over a cable sheave 36 supported by a part ot the main 'frame 28. Each-cable is then passed down` about a differential drum jboth of which drums are mounted upon a-drum shaft 38 capable ot receiving` power trom some suitable source designed to rotate the drums in direction. Counterweights V39 are suspended from the treev ends ot each of the cables so as to counterbalance substantially the weight ot the closure and its att-ached parts. The .closure frame also includes a 'portion of the cover plate 24.. The closure pair of parallel arms 40 pivoted to cleats 4l A' kconnected to its adjacent parallel arm by means ot an arch beam 43 which in turn supports a series of ribbed cover plates 44 enacting to form a plate curved to conform to the configuration ot' the sides of the hood forming the opening- 21.

A trout curtain plate 45 is hung Jfrom the rod 46 connecting` the parallel arms and en- 2 ;af ,;es the front portion of the cover plate24 whenA the closure is in position' closing,- the opening- 2l as shown in full lines in Figures l and 2.l This curtain plate is preferably7 termed of slats 47 pivotally connected in order by links 48, as shown more particularly in Figure 5.

A similar back curtainr plate 49 is hung trom the rear edge of the hood and engages the rear portion o'l the cover plate so as to maintain a substantially air tight-connection between the rear portion ot the hood and the cover plate. lt is notedv that these curtains are hung so that they may be moved outward. .ln this way any accretion which may haveA accumulated on the portion ot the covei` plate within the hoodA is dumped therefrom when the converter is rotated into its discharging; position. 4

The reduced portion 25 ot the hood is provided with a damper 50 (see Fig'. 3) which obviously may be controlled directly by manual means or `as shown in this disclosure,

the damper `may be connected with the "53`with a similar lever 54 ixed to one of the cable Asegments 34.

`In operation it will be understood that in order to charge the converter itis moved into the position shown in Figures l. and 4 and ticed as is usual with such'devices.

by yactuating the Shaft 38A controlling the differential drums, the closure is moved from the full line position shown in Figures l and 2 into the open position shown in full lines in Figure 4 and shown in dotted lines in Figure l. The'converter is charged throughr the opening 21 and by reversing the actuation of the shaft 38 the closure is movedl into its position covering the opening 2l. This closing of the cover will automatically move the damper into the open vposition shown in dotted lines inFigure l and the blowing or other metallurgical operation .may be prac- During this actuation of the converter the Acurtain plates from the hood willbein close engagement with the .cover plate carried by the convertenso that little, if any, air will be drawn into thchoodfrom the outside of the converter. When it is desired to dump the chargel from the converter, it is rotated through the actuation of the `power member 14 as is usual with such devices. During this rotation it will be apparent that the lower end of the hood willr ride on the converter without in any way effecting its normali operation.

By means of a device of this character, it is possible to provide a converter hood with minimum clearance and which willv in no w ay interfere with converter operations. All gases produced by the converter willbe taken up? by the -flue and stack system represented by the conduit'l2 with the least possible strain on the capacity thereof and further there will be an elimination of surface gases about the converter plant, which elimination acts 'to increase flue and stack capacity. Further any distortion which may take place due to the heating of the converter shell will 'have no effect upon the positioning of the hood', so that racking action ofthis large member is practically eliminated.

While I have shown `and described, and have pointed out in the annexed claims, certain novel. features of my invention, it will be understood thatvarious omissions, substitutions and changes in the 'form anddetails yof the device-illustrated andin its operation may be made by those. skilled in theart without departing fromthe spirit ofthe invention. A. Having thus described my invention, I claim:

l. In a device y of the classv described,the

combination of a revolvable cylindrical conf 4from the side thereof, a hood adapted .to re- -verter- `shell mounted with its longitudinal Vaxis of rotation horizontally disposed," a

curved closurehplatel having its ycenter'of L curvature substantially coincident with said 'axis of-rotati`on` and spaced from the' shell,-

-2. In [a device of the class described,l the combination of a revolvable cylindrical converter shell mounted with-its longitudinal y' axis of rotation horizontally disposed, a cover plate carried by the converter` shell and a hood having a lower openv endengaging said closure plate to form a closed connection between the converter and hood.

3. In a device of the class describedythe combination of a revolvable cylindrical vconverter shell mounted with its longitudinalv axis of rotation horizontally disposed .and

provided 'with a converterstack" projecting` ceive .the discharge from said stack, anda closure for the portion of the lo'wer'open' end of the hood which is positioned outsideof the converter stack.l i

4. In a device of the class described, the combination of alrevolvable cylindricall con# verter shell *mounted with its longitudinal axis of rotationhorizontally disposedv`and provided with a converter lstack'projecting 'i' from the side thereof, a hood adaptedto re'- `ceive the discharge fromsaid stack, and .a closure for theportion of the lower 'openv end of the hood which ispositioned'routside f of the converter stack, saidclosure being spaced from the vconverter shell whereby. distortion of. the shell will not affect the form of the closure.

5. In a device of the class described,.t lie combination of a cylindrical'converter shell mounted. to revolve about its' longitudinal axisand having adischarge opening'in the -side thereof, a hood mounted to receive the discharge from said opening, and means l for providing a closed .connection between the opening and hood, said means being spaced. from the converter shell thereby to linsulate the same'jfrom.distortingstrains on the `converter shell. f 5 6. In afdeviceI of the class described, the combination ofa cylindrical converterzshell mounted to 'revolve about its longitudinal axis and havingadischarge opening inthe side thereof, ahood mounted in fixed position to `receive the discharge fromsaid openi y ing, and means carried by lthe converter 'shell materially forclosing thegspace between the converter shell and the adjacent end of thelhood.

7. In adeviceoftheclass described, the

combination ofl a cylindrical converter shell l mounted to revolve about its axisandhaving CIK -said opening, means discharge opening in the side thereof, a hood mounted to receive the discharge from Jior providing a closed connection between the opening and hood, said means being spaced 'from the converter shell thereby to insulatethe same Afrom dis torting strains on the converter shell, and

means for supporting the hood in position engagingsaid closed connection means.

8. In aA device of the class described, the combination of a cylindrical converter shell mounted to revolve about its axis and having a discharge opening in the side thereof, a hood mounted in iixedposition to receive the discharge from said opening, means carried by the converter' shell 'for closing the space between thev converter shell and theadjaccnt end of the hood, and means 'for supporting said adjacent end of the hood from said converter shell whereby the converter and said means are permitted a revolving `movement independent of' the hood.

9. ln a ldevice ofV the Aclass described, a cylindrical converter mounted to revolve about its axis and a stationary hood supported directly on the side of the revolvable converterI and adapted to receive discharges from the converter. 'y

10. ln akdevice oithe class Ades ribed, a cylindrical converter mounted to revolve about its axis, a stationary hood supported directly on the side ofthe revolvable converter and adapted to receive discharges from the converter, and means tending to maintain the hood in position relative to the converter.

11. In a device of the class described, a cylindrical converter mounted to revolve about its axis and provided with hood carrying rings, `a hood mounted in iixed position above the'converter, and carrier Wheels supporting said hood `from said rings.

12. In a device oi the class described', a cylindrical converter mounted to revolve aboutits axis and provided with hood carry-- ing rings, a hood mounted in fined position above the converter, carrier wheels support ing said hood from said rings and equalizers connecting certain of said carrier wheels and adapted to distribute the load of the hood on said rings. v

13. ln a device of the class described, a cylindrical converter mounted to revolve about its airis, a stationary hood supported from the revolvable converter and adapted to receive discharges from the converter and equalizing means disposed between the hood and converter for distributing the Weight oi? the hood on the converter.

14. In a device of theclass', described, a hood provided with a charging opening on one side thereof, a cover plate Jfor closing said opening and means for moving said cover plate to and from a position closing said opening.

opening.

l P its position closingv 15. ln aideviceof the class described, a

converter provided with a charging opening in a side thereof, a hood positioned to receive discl'iarge-sfrom said opening, said hood provided vvith an opening leading to the opening in the converterand a closure for said hood 16. ln a device oi the class described,l a converter provided with a charging opening in a side thereof, a hood positioned to receive discharges from said opening, said hood provided ivith an opening leading .to the opening in the converter, a vclosure for said hood opening, and means for substantially counterbalancing said closure..

17. ln a device of the class described, a converter providedivith a charging opening in side thereof, a hood positioned vto receive discharges 'from said opening, said'hood provided With an opening leading to the opening in the converter, a closure for said hood opening, a differential 'drum and a Aflexible connection between said druml and closure for moving the closure to and trom its oper ative position. if i 18.y In a device of the class described, a hood provided with an openingin the side thereof, a cable segment, a cover plate carried by said segment and adapted to close` said opening and means engaging said seg ment to swing the lcover plateto and from said opening.

19. In av device of the class described, a

hood provided with an vopening in the side l connecting said arms to form a cover plate frame, cover plates carriedby said frame and adapted to close said opening, and a curtain plate hung from said frame.

21. In a device of the classY described, Aa hood `provided with an opening inthe side thereof, a pair of parallel arms, a beam con necting said arms to form a cover plate iframe, cover plates carried by said trame and adapted to close said opening,`a curtain plate hung from said frame, and means 'for controlling said frame.

22. ln. a device of the class described, a hood provided with an opening in theside thereof, a cover for `said opening, a damper for controlling the flow through said hood a Lair/,ses

the shell and adapted to receive the discharges from said converter shell and a connectionbetween said plate and hood adapted to close the space between the adjacent end of the hood and said plate, said connection being flexible relative to the hood whereby accretions collecting within the hood may be removed therefrom when the converter is rotated.

24g. In a device of the class described, a

plate carried by the shell and curved about said axis as a center, a hood positioned above the shell and adapted to receive the discharges from said converter shell and a curtain plate hung from the adjacent end of the hood and engaging' said curved plate to close the space between the hood and plate, said curtain plate being movable in the direction'of rotation of the converter shell whereby accretions on the curved plate within the hood may be removed therefrom automatically by rotating the converter shell.

26. In a. device of the class described, the

combination of a rotary converter providedk with an opening in the side thereof, a hood adapted to receive the discharge from said plate disposed be-.

opening and a curtain y tween the hood and converter designed fsubstantially to close the interior of the hood the entrance of outside airy into the i from hood; s v

27. In a deviceofthe class described, ytheI combination of a rotary converter provided opening and a `curtainplate disposed between the hood and converter designed substantiallyto close the interior of the v hoofd from the entrance hood, said curtain being about an axis parallel to the of the converter 'whereby the curtain may give in the direction of rotation of the coriverter.`

28. In a device of the class'described, the

combination of a rotary converter provided y` I" an opening' in the side thereof.j a. hood with adapted to receive the discharge from said opening, a curtain plate disposed between' the hood and converter designed substan* of outside 'air into` the 'hung to swing" axis of rotation with an opening inthe side thereof, a hood r u `adapted to receive the discharge yfrom said tially to close the interior of the hood from i i the entrance of outside air intothe hood, and y means for supporting the curtain plate from the converten 4 i y,

Signed at Tacoma,'in the county of Pierce and State of Washingtion, this 9th day ofv i July, D. 1917.

CHARLES VAN AMBURGa-fi.` 

